1 . 在平面直角坐标系中,四边形
是矩形,点
,点
,点
.以点
为中心,顺时针旋转矩形
,得到矩形
,点
的对应点分别为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/69f6ae18-2633-43ff-9e70-61e886fd56e7.png?resizew=324)
(1)如图①,当点
落在
边上时,求点
的坐标;
(2)如图②,当点
落在线段
上时,
与
交于点
.
①求证
;②求点
的坐标.
(3)记
为矩形
对角线的交点,
为
的面积,求
的取值范围(直接写出结果即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9040cff7e9e20dd2817ad9888237d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1a9821a00b71f6b7d7a76d91b3f810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c905c723e30f28088fd7f7dc09ef1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76fc88ea5357b675c01e93c62fea338d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9040cff7e9e20dd2817ad9888237d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/257806b3c4d8ba8584e8bcf4284dff35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927456b0989846a2f1573844bbaa2105.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/69f6ae18-2633-43ff-9e70-61e886fd56e7.png?resizew=324)
(1)如图①,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)如图②,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
①求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5913ec3ffee63b054e9b3718a32eebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9040cff7e9e20dd2817ad9888237d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3df2a450ae527f5ffe44035a2c2c18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
名校
2 . 如图,四棱锥
中,四边形
是边长为2的正方形,
为等边三角形,
,
分别为
和
的中点,且
.
![](https://img.xkw.com/dksih/QBM/2020/7/13/2505210547322880/2505975987568640/STEM/e7a9bd20d8f344979085838f51fc1ea5.png?resizew=246)
(1)证明:平面
平面
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6cc3789c0e9b7d1226aa0de3327599.png)
![](https://img.xkw.com/dksih/QBM/2020/7/13/2505210547322880/2505975987568640/STEM/e7a9bd20d8f344979085838f51fc1ea5.png?resizew=246)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ca5b5fd1031438de2d2dd59be8c348.png)
您最近一年使用:0次
2020-07-14更新
|
194次组卷
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3卷引用:福建省宁化第一中学2021-2022学年高二上学期开学考试数学试题
3 . 如图,在三棱柱
中,侧棱
底面
,
,
,
,
分别为棱
,
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/c8e685c6-502b-43b3-981d-a0466bc159c0.png?resizew=174)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231673dd67ab79d3c5da73904ceade1e.png)
;
(2)若
,
,求三棱锥
的体积;
(3)判断直线
与平面
的位置关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/c8e685c6-502b-43b3-981d-a0466bc159c0.png?resizew=174)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231673dd67ab79d3c5da73904ceade1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50857bcc9b0377b73c2c0f98bae0f0a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2990ef24039c6be7643cb582062503a.png)
(3)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
您最近一年使用:0次
2020-01-16更新
|
732次组卷
|
4卷引用:福建省宁德第一中学2020-2021学年高二上学期开学检测数学试题
名校
解题方法
4 . 如图,在几何体
中,四边形
为菱形,且
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/d92d609b-6d32-4e50-9364-38b91fed2b41.png?resizew=239)
(1)求证:平面
平面
;
(2)
为
中点,当
,
时,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a22d6b860f06fe23618b0d3de6768fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2622edcd2b9e514734ded7fbec3f7c6c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/d92d609b-6d32-4e50-9364-38b91fed2b41.png?resizew=239)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc6db50a9709c3f4d84eee7bdf1250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a19338598965bb3856cdd0236bbf694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1803e96e7ccd7a84c1d87c394f271223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdfe0538ece1daca775b1c0d3fad69d4.png)
您最近一年使用:0次
2020-03-22更新
|
316次组卷
|
3卷引用:2020届福建省福州第一中学高三下学期教学反馈检测数学(理)试题
名校
解题方法
5 .
为数列
的前
项和满足:
.
(1)设
,证明
是等比数列;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68c466e8bc7621b3523c49a30d1bd55.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e680f28daa101a42903ef44cf6e6894a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2020-05-23更新
|
629次组卷
|
4卷引用:河北省石家庄市第二中学2019-2020学年高三下学期教学质量检测(开学考试)数学(理)试题
名校
6 . 动圆
与
轴交于
,
两点,且
是方程
的两根.
(1)若线段
是动圆
的直径,求动圆
的方程;
(2)证明:当动圆
过点
时,动圆
在
轴上截得弦长为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ec3d75e53b990bc8f9a4622928dd21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b583230a32b774445332490c511989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5ea5b7512d21716f87616936d5aa996.png)
(1)若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)证明:当动圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b0fc22034c9db29b23c4cf9faf5af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
2020-05-20更新
|
593次组卷
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9卷引用:福建省厦门第一中学2020-2021学年高二分班摸底练习数学试题
福建省厦门第一中学2020-2021学年高二分班摸底练习数学试题福建省厦门第一中学2020-2021学年高二上学期摸底考试数学试题2020届广东省高三普通高中招生全国统一考试模拟(一)数学(文)试题内蒙古通辽实验中学2020-2021学年高一上学期自主检测数学理科试题苏教版(2019) 选修第一册 突围者 第2章 专项拓展训练2 与圆有关的定点、定值、探索性问题山东省日照第一中学2021-2022学年高二上学期第一次月考数学试题(已下线)专题2.17 直线和圆的方程大题专项训练(30道)-2021-2022学年高二数学举一反三系列(人教A版2019选择性必修第一册)(已下线)专题09 与圆有关的定值问题-【重难点突破】2021-2022学年高二数学上册常考题专练(人教A版2019选择性必修第一册)(已下线)2.3 圆与圆的位置关系-高二数学同步精品课堂(苏教版2019选择性必修第一册)
名校
解题方法
7 . 如图,在三棱柱
中,平面
平面
,四边形
为菱形,点
是棱
上不同于
、
的点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/d38923ab-5492-4a67-b272-62bed19c9d85.png?resizew=224)
(1)求证:
平面
;
(2)若二面角
为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eff0db05826cbff651faf0144904b32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f4740c177968035eee35c26313476e1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/d38923ab-5492-4a67-b272-62bed19c9d85.png?resizew=224)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89195bacd53d43195e70c12b5cfa041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512c8feb90b36a8035556fec4d0b86f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
您最近一年使用:0次
2020-03-18更新
|
598次组卷
|
2卷引用:福建省福建师范大学附属中学2022-2023学年高二下学期期初考试数学试题
名校
8 . 已知函数
,
.
(1)求函数
的单调区间;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37fdeef5d17b496bb1d5bb423487f491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a1a4ae644a73a6340af72f4c398d4ae.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a434e1d8e1cb26e8c07c54ae9a9a500.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920b34733dbbef658fd93b430a988774.png)
您最近一年使用:0次
名校
9 . 设函数f(x)=|x-a|.
(1)当a=2时,解不等式f(x)≥4-|x-1|;
(2)若f(x)≤1的解集为[0,2],
(m>0,n>0),求证:m+2n≥4.
(1)当a=2时,解不等式f(x)≥4-|x-1|;
(2)若f(x)≤1的解集为[0,2],
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/227016583473ea7b7471a097bed0e988.png)
您最近一年使用:0次
2020-01-22更新
|
399次组卷
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16卷引用:福建省莆田第一中学2017-2018学年高二下学期期初考试数学(理)试题
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解题方法
10 . 已知函数
,
.
(1)设函数
,求函数
的单调区间;
(2)证明:
,总存在
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799a2313ebba969bc53bde84772a20c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b6f80630de6fe5668527bd26dbb313.png)
(1)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bca4be345087f993a4078e16c16608e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb2a6a099c8734476ff43de1a8adebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab42740d8f095b5f7825d14c4c312096.png)
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